| ITF W15 Norman | 2019/12/04 20:55 | Jessica Failla v Guillermo, Lorraine M | 6-4,6-1 |
| Tucson, Singles W-ITF-USA-46A | 2019/11/18 16:30 | Guillermo, Lorraine M v Jessica Failla | 6-2,7-6 |
| UTR Pro Tennis Series California Women | 2020/08/15 16:00 | Guillermo, Lorraine M v Marcela Zacarias | 6-0,6-2 |
| UTR Pro Tennis Series California Women | 2020/08/12 20:50 | Guillermo, Lorraine M v Marcela Zacarias | 4-6,0-6 |
| UTR Pro Tennis Series California Women | 2020/08/12 16:00 | Kayla Day v Guillermo, Lorraine M | 6-2,2-6,10-3 |
| UTR Pro Tennis Series California Women | 2020/08/11 18:30 | Guillermo, Lorraine M v Davis, Emma | 2-6,6-4,5-10 |
| UTR Pro Tennis Series California Women | 2020/08/11 16:00 | Marcela Zacarias v Guillermo, Lorraine M | 0-6,2-6 |
| UTR Pro Tennis Series California Women | 2020/08/08 18:30 | Guillermo, Lorraine M v Sophie Chang | 1-6,1-6 |
| UTR Pro Tennis Series California Women | 2020/08/08 16:00 | Guillermo, Lorraine M v Maegan Manasse | 6-2,6-2 |
| UTR Pro Tennis Series California Women | 2020/08/07 18:30 | Davis, Emma v Guillermo, Lorraine M | 7-5,6-1 |
| UTR Pro Tennis Series California Women | 2020/08/06 17:15 | Hanna Chang v Jessica Failla | 6-2,6-2 |
| UTR Pro Tennis Series California Women | 2020/08/04 21:00 | Sherif, Jwany v Jessica Failla | 4-6,4-6 |
| UTR Pro Tennis Series California Women | 2020/08/04 18:30 | Jessica Failla v Sophie Chang | 6-4,1-6,10-5 |
| UTR Pro Tennis Series California Women | 2020/08/02 19:45 | Morgina, Anna v Jessica Failla | 7-5,6-3 |
| UTR Pro Tennis Series California Women | 2020/08/02 17:15 | Marcela Zacarias v Jessica Failla | 3-6,1-6 |
| ITF W25 Malibu | 2020/01/15 00:55 | Francesca Jones v Jessica Failla | 6-2,7-5 |
| ITF W15 Norman | 2019/12/08 17:00 | Shaffer, Kennedy v Jessica Failla | 6-4,4-6,7-6 |
| ITF W15 Norman | 2019/12/06 18:30 | Asghar, Jasmine Amber v Jessica Failla | 3-6,4-6 |